No longer want girl name we picked

For our first baby, we had the names Lily and Oliver picked out. We had a boy so Oliver it was. This time we are having a girl, but I no longer like Lily. My husband still likes Lily but has also suggested Evelyn, which I’ve now fallen in love with. He says he is still split 55/45 between Evelyn/Lily. I know he says he likes Evelyn more, but I feel like he’s still holding out hope for Lily. I don’t want him to be disappointed since I’d already agreed to Lily the first time around. But I really don’t want to use that name anymore. I know he will be happy either way, I just feel like I’m letting him down a little.